Question

Дано: П=3,14S.кр=12,56см2 Найти:R-?D-?

Answer 1

S=PiR^2

R^2=4

R=2

D=2R=4

 

 

 

 

 

 

Answer 2

S=pi *r^2=(pi*d^2)/4 R=✅(s/pi) d= ✅4s/pi